SimpleXML: Get value where attribute is variable [duplicate]

问题

<path>
    <name>
        <option id="6523">
            <needle>Haystack</needle>
            <foo>bar</foo>
        </option>

        <option id="6524">
            <needle>Haystack</needle>
            <foo>Bar</foo>
        </option>
    </name>
</path>

Hello again Stackoverflow!

For example, i want the Needle and the foo from option 6524, how do i get those using SimpleXML? I've tried xpath (almoast every topic here on stackoverflow suggests xpath) but that didn't work out for me! Can you guys help me?

Thanks!

回答1:

Try this code:

$xml_str = '.....';

$xml = simplexml_load_string($xml_str);
$result = $xml->xpath('//name/option[@id="6524"]/foo');

echo $result[0][0];

On Codepad.org

回答2:

Use xpath:

<?php
$xml = <<<XML
<path>
    <name>
        <option id="6523">
            <needle>Haystack</needle>
            <foo>bar</foo>
        </option>

        <option id="6524">
            <needle>Haystack</needle>
            <foo>Bar</foo>
        </option>
    </name>
</path>
XML;

$xml = new SimpleXMLElement($xml);
$options = $xml->xpath('//option[@id = "6524"]');
$opt = $options[0];

echo 'needle: ' . $opt->needle . ', foo: ' . $opt->foo;

回答3:

Try something like this:

$xml = simplexml_load_string($string);
$result = $xml->xpath('/path/name/option');
while(list( , $node) = each($result)) {
    echo $node->needle . " - " . $node->foo . "<br />";
}

回答4:

Try this:

$result = $xml->xpath('//path/name/option[@id="6524"]');

来源：https://stackoverflow.com/questions/8105480/simplexml-get-value-where-attribute-is-variable

标签

php

xml

simplexml